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Formosa Optical Technology CoROCO:5312 +0.44%83 Cyclically Adjusted PB Ratio is 1.68 as of Aug. 21, 2026, which is 5% below its 10-year median of 1.77. GuruFocus rates ROCO:5312 with a GF Score™ of 83/100 and a GF Value™ of NT$111.53 (Modestly Undervalued). The stock has 3 warning signs investors should review. Among 519 Medical Devices & Instruments companies, Formosa Optical Technology Co ranks better than 53.76% on this metric.
The historical rank and industry rank for Formosa Optical Technology Co's Cyclically Adjusted PB Ratio or its related term are showing as below:
ROCO:5312'
s Cyclically Adjusted PB Ratio Range Over the Past 10 Years
Min: 1.26 Med: 1.77 Max: 3.31
Current: 1.67
During the past years, Formosa Optical Technology Co's highest Cyclically Adjusted PB Ratio was 3.31. The lowest was 1.26. And the median was 1.77.
ROCO:5312's Cyclically Adjusted PB Ratio is ranked better than 53.76% of 519
companies
in the Medical Devices & Instruments industry
Industry Median: 1.88
vs ROCO:5312: 1.67
The Shiller PE Ratio was first used by professor Robert Shiller. He uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings per share of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted book value per share of a company over the past 10 years.
Formosa Optical Technology Co's adjusted book value per share data for the three months ended in Jun. 2026 was NT$71.369. Add all the adjusted book value per share for the past 10 years together and divide the count will get our Cyclically Adjusted Book per Share, which is NT$54.16 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Formosa Optical Technology Co (ROCO:5312) Cyclically Adjusted PB Ratio Explanation
Compared with the regular PB Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PB Ratio smoothed out the fluctuations of book value during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Cyclically Adjusted PB Ratio should give similar results to regular PB Ratio.
Formosa Optical Technology Co Cyclically Adjusted PB Ratio Related Terms
Formosa Optical Technology Co Cyclically Adjusted PB Ratio Historical Data
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Formosa Optical Technology Co Cyclically Adjusted PB Ratio Chart
ROCO:5312 vs ISRG, BDX, MDLN: Cyclically Adjusted PB Ratio Comparison
For the Medical Instruments & Supplies subindustry, Formosa Optical Technology Co's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted PB Ratio data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Formosa Optical Technology Co Cyclically Adjusted PB Ratio vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, Formosa Optical Technology Co's Cyclically Adjusted PB Ratio distribution charts can be found below:
* The bar in red indicates where Formosa Optical Technology Co's Cyclically Adjusted PB Ratio falls into.
Formosa Optical Technology Co Cyclically Adjusted PB Ratio Calculation
Like the Shiller PE Ratio, the Cyclically Adjusted PB Ratio takes the Book Value per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/B calculation. Because it considers this 10-year average, it's often referred to as the CAPB Ratio.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.
What does a Cyclically Adjusted PB Ratio of 1.68 mean?
Formosa Optical Technology Co (ROCO:5312) has a Cyclically Adjusted PB Ratio of 1.68 as of Aug. 21, 2026. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on Formosa Optical Technology Co and its competitors. This is near median its historical median of 1.77. Over the past decade, Formosa Optical Technology Co's Cyclically Adjusted PB Ratio has ranged from 1.26 to 3.31. According to the industry distribution chart, Formosa Optical Technology Co ranks #240 out of 519 companies in the Medical Devices & Instruments industry, placing it in the top 46.2%.
Is Formosa Optical Technology Co's Cyclically Adjusted PB Ratio too high?
Formosa Optical Technology Co's current Cyclically Adjusted PB Ratio of 1.68 is near median its 10-year median of 1.77. Over the past 10 years, this metric has ranged from a low of 1.26 to a high of 3.31. The Medical Devices & Instruments industry median Cyclically Adjusted PB Ratio is 1.88. Formosa Optical Technology Co's value of 1.68 is 10.6% below this industry median. Based on the distribution chart, Formosa Optical Technology Co ranks #240 out of 519 companies in the Medical Devices & Instruments industry, which is above the industry midpoint. Overall, Formosa Optical Technology Co has a GF Score™ of 83/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Formosa Optical Technology Co's Cyclically Adjusted PB Ratio compare to ISRG and BDX?
According to the Medical Devices & Instruments industry distribution chart, Formosa Optical Technology Co ranks #240 out of 519 companies for Cyclically Adjusted PB Ratio. This puts Formosa Optical Technology Co in the upper half of its industry. The industry median Cyclically Adjusted PB Ratio is 1.88. Formosa Optical Technology Co's value of 1.68 is 10.6% below this benchmark. Historically, Formosa Optical Technology Co's own Cyclically Adjusted PB Ratio has ranged from 1.26 to 3.31 over the past decade. While the company's 10-year median is 1.77 vs. the industry median of 1.88, Formosa Optical Technology Co has consistently been below the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Cyclically Adjusted PB Ratio for a Medical Devices & Instruments company?
The median Cyclically Adjusted PB Ratio among Medical Devices & Instruments companies is 1.88, based on 519 companies in the industry. Companies in the top quartile (top 25%) have a Cyclically Adjusted PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, Cyclically Adjusted PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Formosa Optical Technology Co's current Cyclically Adjusted PB Ratio of 1.68 is 10.6% below the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Cyclically Adjusted PB Ratio mean?
A high Cyclically Adjusted PB Ratio can signal that a stock is expensive relative to its fundamentals. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on Formosa Optical Technology Co and its competitors. For the Medical Devices & Instruments industry, the median Cyclically Adjusted PB Ratio is 1.88 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Formosa Optical Technology Co's current Cyclically Adjusted PB Ratio is 1.68, which is near median its own 10-year median of 1.77. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Formosa Optical Technology Co stock overvalued right now?
Based on GuruFocus' analysis, Formosa Optical Technology Co (ROCO:5312) is currently considered Modestly Undervalued. The stock's GF Value™ is NT$111.53, compared to a current price of NT$91.00 — trading 18.4% below its estimated fair value. The current Cyclically Adjusted PB Ratio is 1.68, which is near median its 10-year median of 1.77 and 10.6% below the Medical Devices & Instruments industry median of 1.88. Formosa Optical Technology Co's overall GF Score™ is 83/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted PB Ratio calculated?
Cyclically Adjusted PB Ratio is calculated from a company's financial statements. For Formosa Optical Technology Co (ROCO:5312), the current Cyclically Adjusted PB Ratio is 1.68 as of Aug. 21, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Formosa Optical Technology Co (ROCO:5312) Overvalued in 2026?
Based on GuruFocus' analysis, Formosa Optical Technology Co stock appears to be undervalued.
The current stock price of NT$91.00 is trading 18.4% below its estimated GF Value™ of NT$111.53.
GuruFocus considers Formosa Optical Technology Co to be Modestly Undervalued.
Key valuation signals for ROCO:5312:
Cyclically Adjusted PB Ratio: 1.68 (near median its 10-year median of 1.77)
GF Value™: NT$111.53 vs. price of NT$91.00 (18.4% below fair value)
Industry Position: 10.6% below the Medical Devices & Instruments median (#240 of 519)
No single metric tells the full story. See the ROCO:5312 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Formosa Optical Technology Co Ltd is mainly engaged in the eyewear business, including optometry services and the retail business selling contact lenses and eye drops. The Group mainly derives revenue from the business divisions of Formosa Optical Technology and Bo Wei Optical, with Formosa Optical Technology generating maximum revenue. The majority of revenue is derived from the sale of glasses. The Group generates the majority of its revenue from Taiwan.
83GF Score
Get the complete analysis for ROCO:5312
Cyclically Adjusted PB Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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